CN107770100A - One kind surveys hair control redundant network framework and redundancy approach - Google Patents
One kind surveys hair control redundant network framework and redundancy approach Download PDFInfo
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- CN107770100A CN107770100A CN201710959791.4A CN201710959791A CN107770100A CN 107770100 A CN107770100 A CN 107770100A CN 201710959791 A CN201710959791 A CN 201710959791A CN 107770100 A CN107770100 A CN 107770100A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/55—Prevention, detection or correction of errors
- H04L49/552—Prevention, detection or correction of errors by ensuring the integrity of packets received through redundant connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/70—Virtual switches
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Abstract
One kind, which surveys hair control redundant network framework and redundancy approach, framework, includes more redundant networks, network head end equipment and network backend equipment；More redundant networks provide the communication link of information exchange for network head end equipment and network backend equipment room；The network head end equipment is connected with aircraft and transmitting support system, is connected with network backend equipment by more redundant networks and is completed test and emission control before aircraft is penetrated；The network backend equipment includes being arranged in the equipment away from launch point, including performs the necessary network backend test equipment of test emission control task and network equipment monitoring and headend equipment administrative unit.The present invention uses real time fail switchover policy, realizes the fast quick-recovery of exchange fault, simplifies link configuration work, and provides recovery ways for headend equipment failure, to meet current quick test and launch mission requirement.
Description
Technical field
The present invention relates to a kind of highly reliable fast recovery to survey hair control redundant network architecture design, belongs to Aerospace vehicle test with controlling
Field.
Background technology
Launch vehicle measurement is aircraft development and the important leverage system taken a flight test, for completing the test in aircraft each stage
And emission control task.Current increasingly intensive space launch mission proposes higher want to quick test lift-off technology
Ask, the necessary bar that reliable, the fast quick-recovery of energy survey hair control network system is guarantee test and emission control task is satisfactorily completed
Part, guarantee is provided for the quick test and transmitting of aircraft.
Existing hair control network system of surveying typically uses front and back end framework and automatic test mode, and wherein front end uses nothing more
People's mode on duty.Realized for the existing kinds of schemes of survey hair control redundant network of front and back end framework, including main/slave link scheme, master
Standby link uses the two-node cluster hot backup scheme of Hot Standy Router Protocol (HSRP), main/slave link using HSRP and quickly generates tree
Agreement (RSTP) scheme etc..Above-mentioned redundant network scheme finds application in space mission, but finds exist in practice process
Following deficiency：1) interchanger fault-finding and switch between master and slave machines time length on link, cause mass data to be lost；2) link configuration
Process is complicated；3) recovery ways are lacked during the active and standby interchanger simultaneous faults in front end.
As it was previously stated, existing solution to be difficult to meet that quick test transmitting proposes to launch vehicle measurement highly reliable,
Fast quick-recovery demand.
The content of the invention
The technology of the present invention solves problem：In place of overcome the deficiencies in the prior art, there is provided a kind of highly reliable fast recovery is surveyed
Hair controls more redundant network architecture designs, using real time fail switchover policy, realizes that the fast quick-recovery of exchange fault, simplified link are matched somebody with somebody
Work is put, and recovery ways are provided for headend equipment failure, to meet current quick test and launch mission requirement.
The technical scheme is that：A kind of highly reliable fast recovery, which is surveyed, sends out control redundant network framework, including more redundant networks,
Network head end equipment and network backend equipment；More redundant networks provide information and handed over for network head end equipment and network backend equipment room
Mutual communication link；The network head end equipment is connected with aircraft and transmitting support system, is passed through with network backend equipment more
Test and emission control before aircraft is penetrated are completed in redundant network connection；The network backend equipment includes being arranged in away from launch point
Equipment, including perform the necessary network backend test equipment of test emission control task and network equipment monitoring and headend equipment
Administrative unit.
More redundant networks are made up of the dual redundant network channel based on virtual exchange system and emergency network passage, double
Redundant network passage and the network channel that emergency network passage is independent parallel；Dual redundant network channel is used for network head end equipment
The transmission of test data and control command information between rear end equipment；Emergency network passage is used for headend equipment, network equipment shape
The monitoring of state information, rear end launch vehicle measurement device management unit is completed to headend equipment by escape truck under emergency rating
Remote control.
The dual redundant network channel include a master one for end switch before two platforms, a master one for end switch after two platforms and
The optical fiber of more connection front and back ends interchangers；The active and standby interchanger in front end is connected with headend equipment respectively, the active and standby interchanger in rear end
It is connected respectively with rear end equipment.
The emergency network passage includes end switch after end switch, escape truck before escape truck and connection front and back end
The optical fiber of interchanger；End switch connects headend equipment before escape truck；End switch connects rear end equipment before escape truck.
The headend equipment is unattended equipment, including front end test device, data processing server and front end add
Electric control unit, front end test device, data processing server, front end add the front end net of electric control unit and more redundant networks
Network interchanger connects；
Front end test device is connected with aircraft, transmitting support system by wired or wireless way, is exchanged by front end
Machine is connected with data processing server, is completed Aerospace vehicle test data acquisition and is sent number to data processing server, reception comes from
Emission control instruction is tested data processing server, handles backward aircraft, transmitting support system is sent；
Data processing server is connected by dual redundant network with front end test device, network backend test equipment, is received
The test emission control instruction that front end test device data and back end test equipment are sent, completes data storage and in real time processing,
End equipment sends test data processing result information, forward end test equipment transmitted test emission control instruction backward；
Front end adds electric control unit to go electric control for adding for network head end equipment, passes through emergency network passage and rear end
The network equipment monitoring and headend equipment administrative unit connection, receive positioned at rear end the network equipment monitoring and headend equipment management
The headend equipment that unit is sent adds electric control to instruct, and the break-make of headend equipment power supply is controlled according to command content, completes front end
The power-up of equipment and remove electricity.
The front end test device, data processing server configure double netcard, and are bound using double netcard, double netcard point
It is not connected, is completed between front end test device and data processing server with the front end host exchange of dual redundant network and standby interchanger
Two-way communication.
The front end test device passes from the test data real time propelling movement that aircraft obtains to front end data processing server
Defeated agreement uses the UDP packet protocols of predetermined format；Front end test device receives the test transmitting control from data processing server
System instruction, host-host protocol use the TCP transmission agreement of predetermined format；The data processing server is by dual redundant network with after
End test equipment realizes that data double-way communicates；Data processing server asks test to the back-end to set according to back end test device data
Standby transmission result data, host-host protocol use the UDP packet protocols of predetermined format；Data processing server receives back end test
The test emission control director data that equipment is initiated, control life is sent by handling, decomposing backward corresponding front end test device
Order, data processing server use the TCP transmission agreement of predetermined format with back end test equipment room Data Transport Protocol；It is described pre-
The formula that fixes udp protocol bag includes source address, stay of two nights address, information category, data field length, data field, the predetermined format
TCP transmission protocol package containing frame head, source address, stay of two nights address, information category, data field length, data field, postamble.
The handling process of data processing server data processing is as follows：
Test data handling process：After test data of the data processing server reception from each front end test device in real time
Store hard disk；Data processing server is handled test data in real time, and result of the generation with physical significance is simultaneously
Cache in internal memory, after data processing server receives the request of data that back end test equipment is sent, taken out from internal memory
Corresponding result, after being packaged into udp protocol bag according to predetermined format, issue corresponding back end test equipment；
Test emission control instruction processing pipeline：Data processing server receives the test transmitting from back end test equipment
Real-time storage is to hard disk after control instruction；According to control instruction content, control instruction is handled, decomposed, corresponding to generation
Front end test device control instruction sequence, corresponding control instruction is sent to corresponding front end test device according to intended flow；
The network backend equipment includes back end test equipment and network equipment monitoring and headend equipment administrative unit；Rear end
Test equipment includes rear end display device and control computer；Rear end display device passes through at the data of dual redundant network and front end
Server connection is managed, obtaining Aerospace vehicle test data from data processing server is used for operator monitor test mode；Control meter
Calculation machine is connected by dual redundant network and the data processing server of front end, and operator needs to pass through control computer according to task
Test emission control instruction is sent to data processing server, test emission control instruction is completed by data processing server
Reason and distribution perform；The network equipment is monitored and headend equipment administrative unit is connected by network with more redundant networks, is received and is shown
Show that the headend equipment work state information from front end, network switch work state information realize the reality of network and headend equipment
When monitor, and can by operator control send headend equipment power up, go electric control to instruct, sent to via emergency network passage
Front end adds electric control unit, realizes the powered up and down of headend equipment.
Hair control redundancy approach is surveyed in a kind of highly reliable fast recovery, and step is as follows：
1) Aerospace vehicle test data are gathered by front end test device and send front end data processing service in a predetermined format
Device carries out data processing, Parameter analysis of electrochemical, passes to back end test equipment according to predetermined format by dual redundant network and is shown；
2) Aerospace vehicle test control instruction is sent in a predetermined format by back end test equipment, is given via dual redundant network delivery
Front end data processing server is handled, parsed, and phase is distributed in a predetermined format after forming front end test device control instruction
Front end test device is closed, is completed to Aerospace vehicle test, transmitting Row control；
3) all headend equipments, the work state information of the network equipment are produced by each equipment, are given through dual redundant network delivery
The network equipment monitoring and headend equipment administrative unit for being placed in rear end are monitored；
4) headend equipment management instruction is produced by network equipment monitoring and headend equipment administrative unit, through emergency network passage
Be delivered in a predetermined format front end plus electric control unit is removed, realize power-up, power-off control to headend equipment.
Compared with the prior art, the invention has the advantages that：
(1) the survey hair that the present invention is built controls more redundant network frameworks, there is provided front and back end test equipment information interaction
Reliable link, by emergency network, front end test device is managed, meets the unattended use demand of headend equipment；
(2) the data transfer main channel in the more redundant networks of the present invention employs exchange piling technology and virtual switch system
(VSS) technology of system, compared to the main/slave link network redundancy scheme using HSRP+RSTP technologies being applied at present, configuration letter
Single, failover is quicker；
(3) the preposition scheme of data processing server that the present invention uses, the interaction letter of test equipment between front and back end is reduced
Data volume is ceased, network switch load between front and back end is reduced, ensure that data transmission credibility；
(4) the headend equipment Managed Solution that uses of the present invention, under the conditions of headend equipment is unattended, effectively increases and be
System reliability.
Brief description of the drawings
Fig. 1 controls redundant network framework to survey hair；
Fig. 2 is end equipment and network primary channel connection diagram before and after double netcard
Fig. 3 is escape truck network connection schematic diagram；
Fig. 4 is network monitoring data stream sketch；
Fig. 5 is headend equipment management process；
Fig. 6 is that working condition and chain supervise data packet format；
Fig. 7 is standby machine switching flow；
Fig. 8 flows to for data processing of information；
Fig. 9 is flow chart of data processing.
Figure 10 is experiment process management program flow graph.
Figure 11 is application layer message transmission protocol header schematic diagram when being transmitted using UDP.
Figure 12 is using application layer message transmission protocol header schematic diagram during TCP transmission.
Embodiment
Hair control redundant network framework of the present invention of surveying is set including more redundant networks, network head end equipment and network backend
It is standby.After headend equipment adds electric control unit, rear end equipment to include including front end test device, data processing server, front end
Test equipment, network equipment monitoring and headend equipment administrative unit are held, more redundant networks are by data transfer main channel and emergency network
Network forms, as shown in Figure 1.
Data transfer main channel is based on virtual exchange system technology dual redundant activestandby hot backup network, each two of front and back end
Interchanger and corresponding connecting cable composition, two activestandby hot backup interchangers of rear and front end are utilized respectively Stack Technology, lead to
Two heap superimposing thread connections are crossed, form a virtual switch, there is provided high bandwidth, the dual redundant information of front and back end facility information exchange
Exchange channels；Front and back end inter-exchange is connected by a plurality of optical fiber, using trunking technology, forms gigabit Ethernet passage
(GEC) transmission bandwidth and link redundancy of transmission link between front and rear end equipment, are improved, improves reliability.Headend equipment and
Rear end equipment be respectively adopted Teaming technologies realize double netcard binding after, exchanged respectively with the active and standby of front-end and back-end interchanger
Machine connects, and forms dual redundant network, and schematic diagram is shown in Fig. 2.
Emergency network passage is independently of the separate network passage of data transfer main channel dual redundant network, is set for front end
Standby monitoring and management, to meet the unattended requirement of headend equipment, as shown in Figure 3.Emergency network channel transfer headend equipment
With the work state information of interchanger, headend equipment and interchanger generation status information, network is transferred to by escape truck and set
Standby monitoring and headend equipment administrative unit.Network monitoring uses Simple Network Management Protocol (SNMP), the network switch, front end clothes
The business equipment such as device configures snmp protocol, operational network monitoring and equipment pipe in headend equipment network monitoring and front end management equipment
Software is managed, obtains, parse and show the running status of the network equipment and headend equipment, and equipment is controlled.Monitoring information
Flow is as shown in Figure 4.
In front end during active and standby exchange fault by back-end network monitoring of tools and front end management equipment to unattended front end
Each equipment is managed and controlled, and completes the recovery of headend equipment working condition, improves system reliability.Management strategy is as follows：
When the equipment control equipment monitor of rear end is to headend equipment failure, reset is sent by escape truck forward end faulty equipment and referred to
Order, it is returned to working condition, if reset is unsuccessful, forward end add electrical control equipment send failure machine power-off refer to
Order, the power supply of failure machine is disconnected, end, which adds, further along goes electrical control equipment to send the power supply instruction of failure machine, recovers the power supply of failure machine, makes
Working condition is returned to after failure machine cold start-up, control flow is as shown in Figure 5.
Each unit in front end uses activestandby hot backup working method, carries out active-standby switch during hostdown, switching flow is as follows：
Standby machine sends running status by the timing of preceding end switch forward end server and chain supervises information (as shown in Figure 6), by front end
Server is arbitrated and switches the active and standby configuration of unit, while each equipment running status, active and standby configuration status, alarm status etc. are sent out
Give the monitoring of the network equipment in rear end and front end management equipment supplies back-end operations personnel's decision-making.When headend equipment n main frames go out
Existing failure, front-end server receive equipment n hostdown information, or can not receive for a long time headend equipment n operational state of mainframe and
When chain supervises information, then equipment n hostdowns being judged, starting switch between master and slave machines flow, original host is switched into standby host, standby host switching
For main frame, complete failure machine-cut and change.Switch between master and slave machines flow is as shown in Figure 7.
Data processing server is placed in front end, service data processing and experiment process management program.Data processor is adopted
Collect and store all data and state caused by each extension set in front end, and ask rear end display terminal to send customization letter according to rear end
Breath, reduces front and back end network traffics, and so as to reduce network frame loss rate, data processor information flow direction is as shown in figure 8, processing
Flow is as shown in Figure 9.Experiment process management program operates in server, and program reads after starting and is loaded into multiple predefined
Business procedure configuration files, flow of task list is generated, and rear end control terminal is passed into the timing of list summary info and supplies preview.Appoint
Server receives the task loading command sent from rear end control terminal, the task flow for selecting Loading Control terminal to specify before business
Journey, and the control commands such as task start, task suspension, task termination are received, respectively set according to the automatic forward end of flow configuration information
Preparation goes out control command, and receives each equipment feedback, realizes automatic dispatching.Experiment process management program flow graph such as Figure 10 institutes
Show.As described above, experiment process management program transmission tasks flow summary info in rear end before test mission, during experiment
Only simple command, the front end such as the task loading command of reception rear end control terminal, task start, task suspension, task termination is each
The control command of equipment is directly sent by front-end server, reduces front and back end information exchange, when reducing the control in flow
Prolong.
The difference that different types of data requires according to data integrity uses different host-host protocols, and rear end display information is adopted
With UDP transmission means, rear end control information uses TCP transmission mode, and customizes host-host protocol, ensures the reliable of information transfer
Property.Figure 11 and Figure 12 sets forth to be illustrated using application layer message transmission protocol header when UDP and TCP transmission.
The known technology for the content category professional and technical personnel in the field not being described in detail in description of the invention.
Claims (10)
1. hair control redundant network framework is surveyed in a kind of highly reliable fast recovery, it is characterised in that：Set including more redundant networks, network front end
Standby and network backend equipment；More redundant networks provide the communication chain of information exchange for network head end equipment and network backend equipment room
Road；The network head end equipment is connected with aircraft and transmitting support system, is connected with network backend equipment by more redundant networks
Connect and complete test and emission control before aircraft is penetrated；The network backend equipment includes being arranged in the equipment away from launch point, bag
Include the necessary network backend test equipment of execution test emission control task and network equipment monitoring and headend equipment administrative unit.
2. a kind of highly reliable fast survey hair that recovers controls redundant network framework according to claim 1, it is characterised in that：It is described how superfluous
Co-net network is made up of the dual redundant network channel based on virtual exchange system and emergency network passage, dual redundant network channel and should
Anxious network channel is the network channel of independent parallel；Dual redundant network channel is used to test between network head end equipment and rear end equipment
The transmission of data and control command information；Emergency network passage is used for the monitoring of headend equipment, network equipment state information, meets an urgent need
Launch vehicle measurement device management unit in rear end completes the remote control to headend equipment by escape truck under state.
3. a kind of highly reliable fast survey hair that recovers controls redundant network framework according to claim 2, it is characterised in that：It is described double superfluous
Remaining network channel includes a master one and connects front and back ends with Duo Gen for end switch, a master one before two platforms for end switch after two platforms
The optical fiber of interchanger；The active and standby interchanger in front end is connected with headend equipment respectively, and the active and standby interchanger in rear end connects with rear end equipment respectively
Connect.
4. a kind of highly reliable fast survey hair that recovers controls redundant network framework according to claim 2, it is characterised in that：It is described emergent
Network channel includes the optical fiber of end switch before and after end switch after end switch, escape truck before escape truck and connection；Should
Anxious Channel front end interchanger connects headend equipment；End switch connects rear end equipment before escape truck.
5. a kind of highly reliable fast survey hair that recovers controls redundant network framework according to claim 1, it is characterised in that：The front end
Equipment is unattended equipment, including front end test device, data processing server and front end add electric control unit, and front end is surveyed
Examination equipment, data processing server, front end add electric control unit to be connected with the front network interchanger of more redundant networks；
Front end test device and aircraft, transmitting support system are connected by wired or wireless way, by preceding end switch with
Data processing server connects, and completes Aerospace vehicle test data acquisition and send number to data processing server, reception comes from data
Emission control instruction is tested processing server, handles backward aircraft, transmitting support system is sent；
Data processing server is connected by dual redundant network with front end test device, network backend test equipment, receiving front-end
The test emission control instruction that test equipment data and back end test equipment are sent, completes data storage and in real time processing, backward
End equipment sends test data processing result information, forward end test equipment transmitted test emission control instruction；
Front end adds electric control unit to go electric control for adding for network head end equipment, passes through emergency network passage and the net of rear end
Network monitoring of tools and the connection of headend equipment administrative unit, receive the network equipment monitoring positioned at rear end and headend equipment administrative unit
The headend equipment sent adds electric control to instruct, and the break-make of headend equipment power supply is controlled according to command content, completes headend equipment
Power-up and remove electricity.
6. the highly reliable fast survey hair that recovers of one kind according to claim 5 controls redundant network framework, it is characterised in that：Before described
End test equipment, data processing server configure double netcard, and are bound using double netcard, double netcard respectively with dual redundant network
Front end host exchange connect with standby interchanger, the two-way communication between completion front end test device and data processing server.
7. a kind of highly reliable fast survey hair that recovers according to claim 5 or 6 controls redundant network framework, it is characterised in that：Institute
Front end test device is stated from the test data real time propelling movement that aircraft obtains to front end data processing server, host-host protocol uses
The UDP packet protocols of predetermined format；Front end test device receives the test emission control instruction from data processing server, transmission
Agreement uses the TCP transmission agreement of predetermined format；The data processing server passes through dual redundant network and back end test equipment
Realize that data double-way communicates；Data processing server asks rear end test equipment transmission processing according to back end test device data
Result data, host-host protocol use the UDP packet protocols of predetermined format；Data processing server receives what back end test equipment was initiated
Emission control director data is tested, control command, data processing are sent by handling, decomposing backward corresponding front end test device
Server uses the TCP transmission agreement of predetermined format with back end test equipment room Data Transport Protocol；The predetermined format UDP associations
View bag includes source address, stay of two nights address, information category, data field length, data field, the TCP transmission association of the predetermined format
View includes frame head, source address, stay of two nights address, information category, data field length, data field, postamble.
8. the highly reliable fast survey hair that recovers of one kind according to claim 7 controls redundant network framework, it is characterised in that：At data
The handling process for managing server data processing is as follows：
Test data handling process：Data processing server receives real-time storage after the test data from each front end test device
To hard disk；Data processing server is handled test data in real time, including generating the result with physical significance simultaneously
Middle caching is deposited, after data processing server receives the request of data that back end test equipment is sent, is taken out from internal memory corresponding
Result, after being packaged into udp protocol bag according to predetermined format, issue corresponding to back end test equipment；
Test emission control instruction processing pipeline：Data processing server receives the test emission control from back end test equipment
Real-time storage is to hard disk after instruction；According to control instruction content, control instruction is handled, decomposed, front end corresponding to generation
Test equipment control instruction sequence, corresponding control instruction is sent to corresponding front end test device according to intended flow.
9. hair control redundant network framework is surveyed according to a kind of any described highly reliable fast recoveries of claim 5-8, it is characterised in that：
The network backend equipment includes back end test equipment and network equipment monitoring and headend equipment administrative unit；Back end test equipment
Including rear end display device and control computer；Rear end display device passes through dual redundant network and the data processing server of front end
Connection, obtain Aerospace vehicle test data from data processing server and be used for operator monitor test mode；Control computer passes through
Dual redundant network and the data processing server of front end are connected, and operator is needed by control computer at data according to task
Reason server sends test emission control instruction, and the processing and distribution of test emission control instruction are completed by data processing server
Perform；The network equipment is monitored and headend equipment administrative unit is connected by network with more redundant networks, before receiving and showing and come from
Headend equipment work state information, the network switch work state information at end realize the real-time monitoring of network and headend equipment,
And can be controlled by operator and send headend equipment power-up, go electric control to instruct, sending front end to via emergency network passage adds
Electric control unit is removed, realizes the powered up and down of headend equipment.
10. hair control redundancy approach is surveyed in a kind of highly reliable fast recovery, it is characterised in that step is as follows：
1) Aerospace vehicle test data are gathered and send front end data processing server in a predetermined format by front end test device
Row data processing, Parameter analysis of electrochemical, back end test equipment is passed to according to predetermined format by dual redundant network and shown；
2) Aerospace vehicle test control instruction is sent in a predetermined format by back end test equipment, via dual redundant network delivery to front end
Data processing server is handled, parsed, before being distributed to correlation in a predetermined format after formation front end test device control instruction
Test equipment is held, is completed to Aerospace vehicle test, transmitting Row control；
3) all headend equipments, the work state information of the network equipment are produced by each equipment, are placed in through dual redundant network delivery
The network equipment monitoring of rear end and headend equipment administrative unit are monitored；
4) headend equipment management instruction is produced by network equipment monitoring and headend equipment administrative unit, through emergency network passage with pre-
It is that the formula of fixing is delivered to front end plus remove electric control unit, realize power-up, power-off control to headend equipment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109144794A (en) * | 2018-08-14 | 2019-01-04 | 华东计算技术研究所（中国电子科技集团公司第三十二研究所） | Redundant Ethernet card |
| CN112689333A (en) * | 2020-12-29 | 2021-04-20 | 北京金迈捷科技有限公司 | Wireless test and emission control information transmission system based on 5G |
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